Quote Originally Posted by one92rs View Post
like eagle mark said in person. tell them you want a street tune.
Not a fan of street tunes. Dynos are labor saving devices, when you have one the street is what takes longer, and lends liability.

If it's a stock truck engine then disable all the emissions, turn down the PE delay threshold, and maybe lessen the PE enrichment slightly if it has stock exhaust manifolds - we aren't protecting cats anymore.

I wouldn't dyno it unless it had a cam, maybe exhaust. Those things tunes are pretty tight from GM, I've done a number of bone stock trucks and netted a 4-5whp gain that wasn't worth anyone's time or money. You can fiddle airflow modes and O2 switchpoints and pick up some nice mpgs, though, I do that a lot.